Optical: systems and elements – Deflection using a moving element – By moving a reflective element
Reexamination Certificate
2011-05-24
2011-05-24
Cherry, Euncha P (Department: 2872)
Optical: systems and elements
Deflection using a moving element
By moving a reflective element
Reexamination Certificate
active
07948668
ABSTRACT:
A scanning beam projection system includes a scanning mirror having a fast-scan axis and a slow-scan axis. Movement on the slow-scan axis is controlled by a slow-scan scanning mirror control system. The control system receives position information describing angular displacement of the mirror. An outer loop of the control system includes least mean square (LMS) tone adders that determine harmonically related signals that when combined produce a scanning mirror drive signal. An inner loop of the control system compensates for a scanning mirror resonant vibration mode at a frequency within the frequency band occupied by the harmonically related signals.
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Cherry Euncha P
Microvision Inc.
Wills Kevin D.
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